13393945 has 4 divisors (see below), whose sum is σ = 16072740. Its totient is φ = 10715152.

The previous prime is 13393927. The next prime is 13393949. The reversal of 13393945 is 54939331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9960336 + 3433609 = 3156^2 + 1853^2 .

It is a cyclic number.

It is not a de Polignac number, because 13393945 - 2⁷ = 13393817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13393949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1339390 + ... + 1339399.

It is an arithmetic number, because the mean of its divisors is an integer number (4018185).

Almost surely, 2^13393945 is an apocalyptic number.

It is an amenable number.

13393945 is a deficient number, since it is larger than the sum of its proper divisors (2678795).

13393945 is an equidigital number, since it uses as much as digits as its factorization.

13393945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2678794.

The product of its digits is 43740, while the sum is 37.

The square root of 13393945 is about 3659.7739001201. The cubic root of 13393945 is about 237.4849925882.

The spelling of 13393945 in words is "thirteen million, three hundred ninety-three thousand, nine hundred forty-five".